Configured for non-contact displacement measurement in rotating machinery, the Bently Nevada 330707-00-20-10-12-00 (330707-00-20-10-12-00 Proximity Probe) provides direct physical execution of eddy-current signal sensing within machine train monitoring platforms.

Model Suffix Breakdown

• 330707: 3300 XL 8 mm Proximity Probe

• 00: Total probe length (standard)

• 20: Case length (20 mm)

• 10: Total length (1.0 m)

• 12: Connector type (Miniature coaxial ClickLoc)

• 00: Agency approval (Not required)

Hardware Specifications

Mechanical Monitoring and TSI Integration

Proper eddy-current probe scaling is mandatory for accurate vibration analysis. The probe generates a high-frequency field that interacts with the monitored rotor surface to convert mechanical position into a voltage signal. Achieving precise gap voltage validation, typically targeted at -10 VDC when centered in the linear range, is necessary for valid transducer output. Cross-talk suppression between adjacent probes must be managed via specific installation spacing to prevent beat frequencies that degrade rotor dynamics data.

Ordering info

• 1 unit 330707-00-20-10-12-00 Proximity Probe

• 1 set protective connector caps

• 1 installation datasheet

Field Installation Guidelines

• Mounting Requirements: The probe must be secured using a bracket designed to minimize mechanical resonance. Utilize jam nuts to lock the probe position once the target gap is set.

• Grounding: Ensure the probe tip is electrically isolated from the machine casing if required by the monitoring system configuration to prevent ground loops.

• Cable Routing: Route coaxial cabling through rigid metallic conduit to provide shielding against external electromagnetic fields and physical damage.

• Gap Setting: Adjust the probe relative to the target using a feeler gauge or micrometer to meet the nominal gap voltage requirements specified by the monitoring system documentation.

Frequently Asked Questions

• How is the probe gap voltage verified?

  The gap voltage is measured at the proximity transducer output using a digital voltmeter. The target value is typically -10 VDC within the probe linear range.

• What is the purpose of the ClickLoc connector?

  The ClickLoc connector ensures a secure, vibration-resistant connection between the probe cable and the extension cable, maintaining consistent electrical impedance.

• Can this probe be installed in high-temperature environments?

  Yes, the 3300 XL probe is rated for operation up to 177 deg C. Ensure the installation accounts for thermal expansion of the machine housing.

• What is the standard target material?

  The probe is factory-calibrated for AISI 4140 steel. Using different target materials will require scaling factor adjustments for accurate measurements.

• Are there restrictions on cable length?

  The total system length is fixed by the probe and extension cable combination. Deviating from the factory-specified total length will affect signal frequency response.

• How do I prevent signal cross-talk?

  Maintain minimum spacing between multiple probes as defined in the 3300 XL system installation manual to minimize electromagnetic interference between sensors.

• Is the probe tip replaceable?

  No, the probe is a sealed unit. If the tip is damaged or the coil is compromised, the entire probe must be replaced.

• What does the agency approval option specify?

  This model indicates no specific hazardous area approval requirements are selected. Confirm local regulatory requirements before finalizing the system design.